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5 Sheets-Sheet 1.

L. M. DEVORE 8v D. C. STOVER.

GRINDING MILL.

No. 269,923. Patented Jan. 2, 1883.

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GRINDING MILL.

No. 269,923. Patented Jan. 2, 1883.

5 Sheets-Sheet 3.

L. M. DLVORL au D. G. STOVER.

GRINDING MILL.

No. 269,923. Patented JaILZ, 1883.

WITNEEEEEI INVENTUFKEI ATTN/E.

A 5.Sheet,s-Sheet 4. L. DEVORE 8v D. G. STOVER.

GRINDING MILL. f.

No. 269,923. Patented Jan. 2.1883.

ATTYE 5 Sheets-Sheet 5. L. M. DEVORE 8v D. C'. STOVER.

l GRINDING MILL.

No. 269,923. Patented Ja.11.2, 1883.

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Wages. TW/V67@ 07@ Nv PETERS. Phnm-Limogmpnur. wmhinsm, D c.

Nrran STATES PATENT erica..

LEVI M. DEVORE AND DANIEL O. STOVER, OF FREEPOR'I, ILLINOIS, ASSIGN- ORS TO SAID DEVORE AND ELAM B. YINGER, OF SAME PLACE.

GRlNDlNG-MILL.

SPECIFICATION forming part of Letters Patent No. 269,923, dated January 2, 18SS. Application filed December 19, 1878.

T all whom it may concern:

Be it known that we, L. M. DEVORE and D. C. STOVER, of Freeport, county of Stephenson, and State of Illinois, have invented new and useful Improvements iu Grinding-Mills; and we d hereby declare that the followingis a full, clear,and exact description of the same, reference being had tothe accom panyingdrawings, and to the letters of reference marked Io thereon.

Figures l and 2 are side elevations, looking at opposite sides of the mill. Figs. 3 and 4 are-elevations showing the insides of the respective plates with the stationary grindingrings attached; Figs. and 6, side elevations, looking` at opposite sidesof the central ring and its connecting devices and operating-lever, Fig. 7, a side elevation of the lever side of the central ring with the lever and its disk or zo plate removed; Figs. 8, 9,and 10, details showing diferentviews of the ring-supporting drum or plate and the operating-lever, Figs. l1 and 12, details showing opposite sides of the lever disk or plate, Fig. 13, a detail. showing the interior of the actuating-drum; Fig. 14, a derail showing thedrum and the lever-plate, with the drum partially broken away to show the pawl; Fig. l5, a side elevation, showing the manner of connecting the mill with the 3o actuating mechanism of a windmill; Fig. 16, a detail representing the means for connecting the windmill with the grinding-mill when the latter is located at a distance. Fig. 17 is a transverse vertical section through the grinding-mill.

'lhis invention relates to certain improvements in grinding-mills designed more-especially l'or grinding small quantities of material, and adapt-ed to be used with a windmill or i 4o other light motive power, and to that class of such mills in which the grinding devices consist of two stationary rings and a central movable ring, between which thematerial is forced and ground on both sides, the material being placed in a suitablehopper provided with agiwtators for feeding the material, and the rings being incased or inclosed between plates having a suitable ooeningfor the discharge of the ground material.

5o The object of this invention is to perfect and improve the arrangement of the grindingrings in their relation to each other and to the devices by which the movable center ring is actuated; to improve the form of the case for the ring and the hopper for the material, and the location of the grinding-ring in reference to the hopper, so as to insure a direct and more reliable feed; to improve the form and construction of the stationary grinding-rings;

to improve and simplify the connection or at- 6o tachment between the center grinding-ring and the journal or arbor by which it is actuated Vand the devices for imparting the required movement to the journal or arbor, and to sirnplify and improve generally the construction, arrangement, and operation of the mill; and its nature consists in the features of construction and combination hereinafter described and claimed.

In the drawings, A represents a plate of 7ometal forming one of the side plates of the mill, and consisting essentially of a ring or annular portion, a, with flanges or ears a', having suitable openings, a2, through which bolts or other fastening devices can be passed to 7,5 secure or attach the mill to a frame-work or support of any required form. This plate A has an extension, a3, cast or formed therewith, which forms one-halfof the hopper, a suitable opening, a, being provided at the proper point 8o for'the passage of shaft or arbor of the agitator and to furnish a bearing therefor. As shown, the peripheryofthe plate A is provided adjacent to the hopper-extension ai with an ear or lug, cti-one on each side of the base of the hopper. These ears are each provided with two openings, 011e oi' which, a, is for the passageof a bolt,a10, by means of which the plate A is connected with its corresponding plaie, and the other, an, is for the passage of a pivot 9o or pin, which forms the hinges for the respectivecovers,ashereinafterdescribed. Asshown, the periphery of the plate at the point just above the ljirnges or ears a on each side is provided with ears or lugs a8, each ofwhich has an opening, a9, for the passage of a bolt similar to all), and for the same purpose.

B is a plate corresponding to the plate A, just described, and having a ring portion, b,

with attaching-flanges b', with openings b2 and roo i extension b3, forming the other halfof the hop per, and having a hole or opening at the point b4 tor the passage of' the agitator-shaft, f'ortning a hearing therefor, and having its periphery provided wit-h ears or lugs b'l 118, with openings b9 and b, the arrangement of these several devices being` sitnilar to the arrangement of the corresponding devices, a, a3, ai, al, a, a9, and all, of the plate A, so that when the two plates are brought together their corresponding parts will coincide, and they can be united by passing suit able bolts, al, through the openings a9 b9 in the lugs aT b7 a 118, and form a casing and a hopper, as shown in Fig. l. Each plateA B is provided with a central circular opening.

U is a shaft or arbor, one end of which is supported in au upright or standard, a5, sccured in any suitable manner to the outer f'ace of' the ring or plate A, the unatfached end of' such standard having a suitable opening, a6, to receive the end of' the shaft or arbor and form a bearing therefor, and the other end of this shaft or arbor is mounted in a support formed of radiating arms or a spider, b5, attached in any suitable manner to the outer face ot' the plate or ring B, which support or spider is pro'vided with an opening, bG, in line with the opening a5, through which the end of' the shaft C passes, and which forms a bearing therefor. A hub, c, is formed with or firmly attached to this shaft C, and this hub is provided with an annular diskor flange,c, around theperiphery of'whichis anoverhanging flange, c2, the inner f'ace of which is provided with serrations c3. The face of tite flange c is provided with a series of' pins, c4, three, as shown, arranged in a circle equidistant from the center of the flange, which pins or studs project out from the face of' the disk on the hub side, as shown in Fig. 9. A hub, c5, is loosely mounted on the shaft C, which hub is provided with a disk or flange, c, on the f'ace of which, adjacent to the disk c', is pivoted a pawl, c7, the free end of which is arranged to engage with the. serrations or ratchet-teeth c3 of' the rim or flange c2. This pawl is held in engagement with the serrationsor ratchetfeeth by a spring, c, one end of' which isattached to the hub of and the other arranged to bear against the pawl in such manner as to hold the pawl in engagement when the plate or disk c6 is advanced and allow the end of the pawl to ride over the sel-rations or teeth when the plate or disk is receded. tached in any suitable manner to the inner end of' an arm or lever, o9, which lever is of sufficient length to project beyond the peripheries ofthe plates A B when the parts are together, and is provided on its outer end with a series of' adjusting-holes, c1", for making the connection between' the lever and the motive power at different points in relation to the center ot motion of' tbe plate c6 to give a longer or shorter stroke to the lever, and consequently a greater or less arc of rotation to the plate or disk c and the center ring which it operates. When the parts are together the inner face of the The plate or disk c is at-V disk c6 bears at its edge or periphery against the face of' the flange or rim c2, and the pawl c7 is in position to engage with the ratchetteeth or serrations c.

D is the central grindingring, consisting of an outer ring having on each side or face grinding-ridges which form the grinding-surface, and having its center provided with a web having a central circular opening, d, adapted to fit the hub c, and provided also with a series of openings, d', corresponding to the studs or pins c, to receive the studs or pins and connect the ring with the backing-plate c. At the point of junction of` the web and the an-` nular grinding-ring upon one side, extending entirely around, is an outwardly-projecting flangeorritmdz. lheopposite side,which,when the parts are together, lies adjacent to the face of' the plate c', is lef't plain or unprovided with a flange or rim, so as to fit against the f'ace of c', or nearly so, the diameter of' the web corresponding to the diameter of' the plate, or nearly so, so that the plate can enter the de pression formed by the web in the ring D.

The stationary grinding-rings, represented by the letters a12 b", are each formed from an annular ring, not continuous, but having a portion cut away transversely t0 leave an opening corresponding in length to or nearly to the length of' opening in the hopper, through which the material can pass to enter the grinding-surfaces. Each ring corresponds in diameter and width to the diameter and width of the grindingface or ritn portion d3. of' the center ring, and 1s provided with'a grinding-face similar to the grinding-faces ofthe ring D on that side which lies adjacent to the face of' the center ring. The opposite side or face ofeach ring a b is left pla-in or smooth, approximately, so as to fit against the inner tace of' the plate A or B, to which the rings a12 bl2 are respectively secured. These rings a bl2 are attat-hed to their respective plates, solas to bring the transverse opening of each in line with the hol'iper-opening, and they may be held securely in place by means of screws al, as shown, or in some other suitable manner. The circular openings in the centerol' the ring and the circular openings at the centers of' the plates A B are ofthe saine or nearly the. saine diameter, and the diameter of these openings cortesponds tothe outer diameter of the flange or rim d2 and the flange or ritn ce and plate d6, and when the parts are together'the plate di has its periphery coinciding with the periphery or face of' the opening at the center of the' plate A, and lies within such opening. The lever a9, which is attached at its lower end to the outer face of' the disk or plate c6, is bent or curved outward atthe circumference of' the plate o, so that its main portion will come outside of' the plate or ring A.

From the foregoing it will be seen that when the rings au 012 are attached to their respective plates with the transverse opening ot' eachin line with the hopper, and the ring D is connected with the backing-plate c through the IOO IIO

openings d in its web or center and the pins c4 on the face of the lplate c',- with the hub c passing into the circular opening d at the center of the web, and the plate cL is placed in position with its inner face in contact with the faceof the ange or rim c2, and the shaft C is mounted in its end supports, t5 b5, and the pla-tes A B attached together by the bolts am or in any other suitable manner, the acting or grinding devices areinclosed within the case or shell, and at the same time the drum or rim c2, with the liauge or rim 12,'completely lills and covers the space formed by the circular openings at the center of the grinding-rings, and furnishes a support or rest on which the material can lie and aguard to prevent the mterial from escaping after it has passed to the grinding-surfaces, except at the outer circumference or periphery of the grinding-rings.

E is a shaft, supported at its ends in the openings (t4 b4 of the hopper, and having one of its ends projecting beyond the outer face of the hopper, to which end is suitably secured a pinion, c', which gears with a wheel, el, located upon the end of the main shaft C, which projects beyond the face of the plate B for that purpose. The shaftE has attached thereto arms or agitators e, which are arranged in two sets or seriesone on each side ofthe center ring-so as to come in line with the hopperopening and` the transverse opening for the feed in the respective rings a b, so as to act on the material and force it down to pass'to the grinding-surfaces through the openings in the stationary grinding-rings.

F are covers, one hinged to .each ear a7 by the pin or pivot which passes through the opening a". These covers, as shown, extend from their point ot connection with the earnT around to or nearly to the ear-a8, and that portion of the rings et between the terminal points ofthe covers is lett open and forms the opening for the discharge of the material when ground, and, as shown, the terminal point of each cover is provided with a catch, j', to engage with the bolt which passes through the lower lugs, a? 118, andlocks or holds the cover down. As shown, that portion ot' the case between the ears or lugs ai IfI on each side is closed by inwardly-projecting flanges extending from the base of the hopper portion y tothe end ofthe ear, terminatingat the point where the cover is applied.

Other means than the ears or flanges could be-used for attaching the mill to a suitable frame or support, and the two sections ot' the casing formed by the plates A B could be secured together by lsome other arrangement pawl ci, engaging'with the ratchet-teeth or serrations on the rim or ange c2, gives the plate c' an intermittent rotary movement, communicating a corresponding movement to the center grinding-ring, and also producing a similar movement for the shaft C, which shaft operates the wheel e2, and through the gearpinion c gives an intermittent rotation to the shaft E and the beaters or agitators c.

The operation is as follows: The material to operated upon is placed inthe hopper and power is applied to the lever e9, giving the center ring, D,shaft G, and beater-shaft E an intermittent rotary movement, as just described. The beaters or agitators force the material from the hopper to the feed-openings into the grinding-surfaces on each side of the center ring, the material being delivered to both grinding-surfaces on each side ofthe center ring, and being ground by both surfaces through the intermittent rotary movement ot' the center ring, and, when ground, passing 'from between the -grindingsurfaces at the periphery of the grinding-rings through the discharge-opening, as usual.

As shown in Fig. l5, the mill is shown as being used in connection with a windmill.

H represents the drivingrod of the windrnill, having thereon at the proper point two rings or collars arranged to engage'with levers l, one end of which is pivoted in any suitable manner to the frame-work ot' the mili, and the other has pivoted thereto a link or rod, t', the lower end of which can be connected bya pin or bolt, or otherwise, with such one of the openings cl" in the'lever c9 as is required to give the lever the desired length ot stroke. As shown, two larms or levers, l, are. provided, one on each sidel ot' the rod H, and stay-pins t" are provided, passing through the levers transversely, forming` an openinginwhich the rod plays. Instead ot' two levers, l,a single levercould be used,ifdesired, and other means than the levers and the link could be provided` for connectingl the rod with the actnating-lever of the mill.

In operation the stroke of the pump-rod or pitman is communicated to the mill-lever, giving such lever its vibratory or oscillating movemeut and producing the intermittent rotary movement described l'or the operation ot' the center grinding-ring and the other devices.

By using the links and levers intermediate between the pump-rod and the mill-lever and providing adjustable collars or rings on the pump-rod, the length ot' stroke can be increased or diminished by adjusting the collars without changing the sti-olie ofthe pump-rod or pitman.

' When the grinding-mill is located at a distance from the windmill the connection between the two can be made by means ot' a quadrant or bell-crank device, J, (shown in Fig. 16,) suitable connecting-rods being provided. I 1

1f desired, a large hopper to contain a large IOO IOSv

IIC

amount of the material may be located over the hopper formed with the plates A B.

The center ring passes between the two stationary grinding-rings and covers the transverse cut-away portion or opening in each ring, into which the material passes, and thus it will be seen the material will be caught by the face of the center ring and carried into the space between the grinding-faces of the stationary ring and the center ring on each side, the center ring acting to this extent to feed the material from the transverse openinginto the grinding-space.

By the arrangement shown and described a direct feed from the hopper through the stationary rings transversely is formed, Vbringing the material in direct contact with the center ring on each side, so that the grinding is performed on both sides of tbecenter ring equally. A housing or support is provided, by which the malerlal is retained and prevented from passing inwardly beyond the line of the grinding-surfaces. A center grinding-ring is tnounted,with its actuating devices,on the same main shaft, and the support for this ring, with tlte actuating devices therefor, are located witltin and around the center o't the ring, occupying but a small space, and forming a guard or support by which the material is retained within the grinding-space. The connection for the grinding-ring is very simple, enabling the attachinent of the ring to its driving-shaft to be quickly and readily made, and when in position the ring is free to conform to any slight irregularities in the feed. The same shaft which drives the grinding-ring also furnishes the means for driving the beater-shaft, and the entire arrangement is one that brings the working parts into a very small and compact space, and so as to be inclosed by the plates A B and the covers F to tite extent required lor protecting such parts, all of which features, when combined as shown and described, produce a mill simple in its construction and arrangement and well adapted for the grinding of small quantities, and which will not be liable to get out ot' order, as the actuating devices are covered o r inclosed, so as not to be injured or broken by obstructions or otherwise.

\Vhat we claim as new, and desire to secure by Letters Patent, is-

l. The metal plates A B, having extensions to form the hopper, in combination with stationary grinding-rings, each havinga cut-away portion to form a. transverse opi-ning, which leads lrotn the circumferenceto the interior of the ring, for leeding, and adapted to be attached to the plates A B, substantially as specilied.

2. 'lhe metal plates A B, having extensions to form the hopper, iti cotnbination with stationary grinding-rings, each having acutaway portion Iorming transverse feed-openings leading from the periphery to the interior of the ring, and a movable grinding-ring, substantially as and tor the purposes specilied.

3. The metal plates A B, having extensions to form a hopper, in combination with stationary grinding-rings, each having a cut-away portion to form transverse feed-openings leading from its periphery to its interior, and a central opening, a central grinding-ring, and a drum supporting the central ring, substantially as and for the purposes specitied.

4. The metal plates A B, having extensions to forni a hopper, and stationary grinding-rings attached to the plates and having transverse cut-away portions and central openings, in combination with a central drum adapted to lill the central openings and furnish a support for the material, substantially as specified.

5. A central shaft having a drum, in colnbination with a central grinding-ring, stationary grinding-rings, each having afeed-opening leading from its periphery to its interior and located directly under the hopper, and plates or casing A B for supporting the central grind` ing-ring between i he stationary grinding-rings, substantially as specified.

(i. `A central shalt, having ahnb and a drutn provided with pins or studs, in combination with a central grinding-ring, having a web or center with a central opening anda series of holes coinciding with the drutn-pins for attaching the central grinding-ring, substantially as specified.

7. A central grimling-ring and a central shaft, having a hub and a drum for supporting a grinding-ring, in combination with a movable disk carrying devices, substantially as described, to engage with and tnove the drutn, and loosely mounted on the central shaft for operating the central grinding-ring, substantially as specified.

8. An annular grinding-ring having at its center a web provided with a central opening and a series of holes, in combination with a backing-plate provided with a series of pins to interlock with theholes in the web of the ring and connect the plate and ring together, substantially as and for the purposes specified.

9. rlhe combination of stationary grindingrings, each having a transverse cnt-away portion or mouth,and a movable grinding-ring located between the stationary grinding-rings, with a drum or center supporting the central grinding-ring and furnishing a base or support for the material, substantially as and t'or the purposes specilied.

l0. The cotnbination of stationary grindingrings, each having a transverseopening or cutaway portion, and a. movable grinding-ring located between the stationary rings, and having a web or center provided with a series of holes, with a drutn or plate having a series of 125 pins connecting the drutn and center ring arid forming a rest for the material, substantially as and lor the purposes specified.

1l. The combination of stationary grindingrings, each having a transverse cutaway portion or mouth and a central circular opening, and a central grinding-ring located between IOO IOS

IIO

the stationary rings, and provided with a web or center having a seriesot' holes, With a drum or plate having a series otl pins, and a shaft on which the drum is mounted, substantially as and for the purposes specified.

12. A shaft or arbor and a drum or backin gplate mounted thereon and provided with a t series of pins, in combination with a movable grinding-ring having a web provided with holes for connecting the shaft, drum or plate, and ring, substantially as specified.

13. A shaft or arbor and a drum or backing plate mounted thereon and provided With a series of pins, in combination with a central grinding-ring having a web provided with holes, stationary grinding-rings, and plates A B for connecting the several parts together, substantially as and for the purposes specified.

14. The combinatzon of the shaft or arbor and movable grinding-ring with a backing or supporting plate which receives and supports the movable grinding-ring, and having a rim or flange on its periphery with internal serrations, substantially as and for the purposes specified.

15. A shaft or arbor, a movable grindingrin g, and a backing or supporting plate which receives and supports the movable grindingring of a grinding-mill, and having a flange or rim on its periphery provided-with internal serrations, in combination with a movable plate or disk carrying devices to engage the serrations, and means for actuating the movable plate, substantially as and for the purposes specified.

16. A central ring, a backing or supporting platetberefor having an iuternallyserrated rim or flange, and a shaft or arbor,in combination With a disk or plate carrying a pawl to engage the serrations, and an actuating-lever for the disk or plate, substantially as and for the purposes specified.

17. The combinatiomwith the grinding-rings,

`of the beaters e, located on a shaft, E, in the hopper, and operating to force the material through the openings formed through the stationary grinding-rings, so as to lead from the periphery of each stationary ring to its center, said beaters being located one on each side of the central grinding-ring, substantially as described.

18. The plates A B, stationary grinding-rings,

specified.

LEVI M. DEVORE. DANIEL C. STOVER.

Witnesses:

A. T. GREEN, J oHN A. MARTIN. 

